Internet quality monitoring system

What does quality mean to the user? Is he (if) willing to pay more for it? If everything "just works" and YT "does not buffer" him, is he 100% satisfied? How have the perception of quality changed during Covid and remote work and education? How important is the offered bit rate, including "upstream", on the perception of quality? Can you win with quality? And the main question: why does a user need 1 Gb/s at home - is it "ultimate quality"?